Describe the bug

Not sure if this is a bug or intended. According to this breaking change, if the state caused an $effect to rerun, Svelte should provide the previous value of the state in the teardown function. This work for $state currently, but not for $derived, though it does work if $derived is reassigned.

Reproduction

https://svelte.dev/playground/untitled?version=5.33.18#H4sIAAAAAAAACnWPy2rEMAxFf8WIgcl0woSuCm4SmC_oqqumizyU1tRVjKVkOgT_e3HS92MldHSPZM9A9TOChlsSIxY7SKE3Fhn03QxydnEWAaTvyaNzB57QSmRNzfgXbwcSJGHQkHPrjZOyokosimJVqA1LLZhc7q4_6II79GbCLuELXkZUyQb7HltJkp0qSjVHVEk7EA8WD3Z4SLaPRjFrtU0Vr5ZU4lFGT-qb9ENrzvjbC7GEXUV59vlsyptRZCA1UGtN-1TM617e70N57DrFebYmyv-z8X9XobyZ0J-8kXj7q-VK1mrmkGfurV36FUAKgi8CWvyI4T4FqY09GepA97VlDK_x94v_xwEAAA==

Logs

System Info

Svelte playground (5.33.18)
Chrome 137.0.7151.56

Severity

annoyance